Unless you like being on the bleeding-edge of cameras, I would keep it. The differences between the A80 and latest (A95) is not that great. You aren't missing much. However, if you want to upgrade to a higher-priced more feature-oriented camera (eg. ultra-zoom, low-end prosumer, etc) then you should consider selling (just so that you can get more cash; do note that the higher-end cameras are larger so you will lose the compactness if you move into a higher class)...

Keep in mind the a80 will not be alone on the falling price issue. I had an Olympus Stylus 300 that I replaced even dollar with an SD100. Within 2 months the stylusturned intoa $300 camera and the Powershot became a $230 camera.

I had replaced cameras pretty often to that point (the SD100 was my 11th camera in4 years) so I of course saw opportunity to get a new camera everytime I went to the store.

Then it hit me... I was crazy about my camera. So much so that until an upgraded model of it (the SD110 didn't count because I felt it was the same camera), the camera was worth more to me than whatever I could sell it for or trade.